UBUNTU-CVE-2023-2911

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    UBUNTU-CVE-2023-2911

    Published: 21 Jun 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-2911
    Aliases:
    USN-6183-1

    Summary:

    Details: If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.

    References: https://ubuntu.com/security/CVE-2023-2911, https://kb.isc.org/v1/docs/cve-2023-2911, https://ubuntu.com/security/notices/USN-6183-1, https://www.cve.org/CVERecord?id=CVE-2023-2911

    Affected packages

    Package

    Name: bind9

    Purl: pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.15?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:9.16.1-0ubuntu2.15

    Affected versions

    1:9.11.5.P4+dfsg-5.1ubuntu2
    1:9.11.5.P4+dfsg-5.1ubuntu3
    1:9.11.5.P4+dfsg-5.1ubuntu4
    1:9.11.5.P4+dfsg-5.1ubuntu5
    1:9.11.14+dfsg-1ubuntu1
    1:9.11.14+dfsg-3ubuntu1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-2911 | CVE-DB